On one hand: it's not like DLCs don't exists, this game has been popular enough during the past months to warrant such thing and besides, for what i've heard, this game is good enough and has sold well enough to warrant at least 1 DLC in which Ada could show up with this look.
However, on the other hand: should i remind you what happend last time she was in the same game as Chris Redfield? Because RE 6 happened, not to mention that you probably don't want Ada to be in the same village as Chris, specially one with such quantity of rocks that can be used as boulders.

All we need now is tentacles, and there probably will be tentacles, and this could have been a First-Person Bloodborne spin-off.